O4
G28G91Z0
T1M6
G54G17G40G49G90G80
M3S2000
G43G1Z100H1F2000
X0Y0
Z5
#1=0
N10#1=#1+0.5

G1Z-#1F1500
G1G41X-10Y10D3
G3X-20Y0R10
G1Y-20,R10
X20,R10
Y20,R10
X-20,R10
Y0
G3X-10Y-10R10
G40G1X0Y0

IF[#1LT5]GOTO10
G49G1Z100F2000
M5
M99